A patient died after a blunt trauma to chest, most common cause of death in blunt trauma to chest is

Answer is pneumothorax. The common life threatening conditions due to blunt trauma are Tension pneumothorax, Massive haemothorax, Flail chest etc, out of which Tension pneumothorax is most common cause. Pericardial tamponade needs to be differentiated from a tension pneumothorax. It is most commonly the result of penetrating trauma. Reference: Bailey & love, 27th Edition, page no = 367